For the next person wondering and finding this thread, the cc_config.xml file --if made-- will be in the data directory, which shows its path in the event log (start-up messages). This directory will be hidden on most Windows versions. Either make sure Windows shows hidden files and folders, or fill in the path directly into Windows Explorer and press Enter.

When you have just installed BOINC, there will be no cc_config.xml file. BOINC will only make it when you add something to the Exclusive Applications option in Tools->Computing preferences->Exclusive Applications. When adding programs here, BOINC will save a complete list of its most used log flags and options to the cc_config.xml file, most of them disabled.

The cc_config.xml file can be opened with any simple text-editor, such as Notepad. No need to specifically get an XML editor. Even at this time, the XML BOINC uses is specially designed for BOINC use only. But when you save changes, make sure to do so as an "all files" option in ANSI format.

Use the "Read config file" option in the Advanced menu to re-read the cc_config.xml file.
____________Jord

Used to be a single voice that vanished in a crowd. Vague just like a distant sun when hidden by the clouds.
Found a way to surface and to speak my truth aloud. Be powerful. Stand fast and proud.